ICAT Research Activities
Composite Transducers
Magneto-electric composite sensors have been developed by laminating two magnetostrictive plates (Terfenol-D) and a piezoelectric ceramic plate (PZT or PZN-PT single crystal). This laminate can generate electric field on the piezo-plate via the stress generated by the magnetostrictive plates, when the composite is irradiated in a magnetic field. The sensitivity of magnetic field detection is 4-5 times higher than the conventional magnetic sensors, and further a wide detection frequency range (from pseudo DC upto k Hz) has been achieved. This sensor may be usuful for monitoring the magnetic noise generated by home appliances such as TVs and by high transmission cables.
Photo 7: Magneto-electric sensor for detecting the
magnetic noise signal generated by a
permanent magnet shaken by a hand.